我想在java中运行“ls”命令，我的代码是- 注意： - 我正在使用WINDOWS。在java中运行linux命令

import java.io.IOException;

public class Example

{

public void fn()

{

Runtime run = Runtime.getRuntime();

Process p = null;

String cmd = "ls";

try {

p = run.exec(cmd);

p.getErrorStream();

p.waitFor();

} catch (IOException | InterruptedException e) {

e.printStackTrace();

System.out.println("ERROR.RUNNING.CMD");

} finally {

p.destroy();

}

}

public static void main(String[] args) throws IOException

{

Example sp = new Example();

sp.fn();

}

}

，但我得到以下错误，同时运行在Eclipse的

java.io.IOException: Cannot run program "ls": CreateProcess error=2, The system cannot find the file specified

at java.lang.ProcessBuilder.start(Unknown Source)

at java.lang.Runtime.exec(Unknown Source)

at java.lang.Runtime.exec(Unknown Source)

at java.lang.Runtime.exec(Unknown Source)

at Example.fn(Example.java:12)

at Example.main(Example.java:28)

Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified

at java.lang.ProcessImpl.create(Native Method)

at java.lang.ProcessImpl.(Unknown Source)

at java.lang.ProcessImpl.start(Unknown Source)

... 6 more

Exception in thread "main" ERROR.RUNNING.CMD

java.lang.NullPointerException

at Example.fn(Example.java:23)

at Example.main(Example.java:28)

什么需要这个代码加以纠正？我应该添加什么库等来执行这段代码？

2017-03-07

chun

+7

'我想在java'中运行“ls”命令你确定吗？因为如果你需要的是系统上的文件列表，这是一个可怕的方式来执行它有多种原因 –

+0

你如何运行程序上面？ –

+0

尝试'run.exec(“bash”，“-c”，“ls”);' –